Abstract
Taking the 6 townships and 23 towns in the administrative areas of Yongcheng as objects of study, this paper evaluates the resources quantity of organic matter (OM) in the agricultural wastes (straws and livestock/poultry excrements) and the OM demands for the arable soil in the studies area respectively, and also make discussion of the demand-supply ratio of OM for every object of study. The study result shows that the demand-supply ratio for every object is lower than 1.0. In 2013, the OM resources of the total straws in Yongcheng city reached about 1,007,600 tons, and the OM resources of livestock excrements was about 407,500 tons, both added together to 1,415,100 tons of OM in total; the OM demands of for the whole arable soil in these areas were about 1,146,600 tons; therefore, the demand-supply ratio was about 0.81. With demands below supply, in theory, the agricultural organic wastes cannot be fully utilized into the arable soil in these areas.
